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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| <!DOCTYPE html> | ||
| <html lang="en"> | ||
| <head> | ||
| <meta charset="UTF-8"> | ||
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | ||
| <title>rM-emu</title> | ||
| </head> | ||
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| <body> | ||
| <canvas id="display" width="702" height="936"></canvas> | ||
| <div id="message-log"></div> | ||
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| <script src="script.js"></script> | ||
| </body> | ||
| </html> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| { | ||
| "compilerOptions": { | ||
| "checkJs": true | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,238 @@ | ||
| // TODO: (dynamic) scaling | ||
| const scale = 2; | ||
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| const canvas = /** @type {HTMLCanvasElement} */(document.getElementById('display')); | ||
| const ctx = canvas.getContext('2d'); | ||
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| function publicLog(message) { | ||
| var messageLog = document.getElementById("message-log"); | ||
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| var messagePara = document.createElement("p"); | ||
| messagePara.textContent = message; | ||
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| messageLog.appendChild(messagePara); | ||
| } | ||
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| // idx | msg | ||
| // ----|------------- | ||
| // 0 | Input | ||
| // 1 | GetUpdate | ||
| // 2 | PowerButton | ||
| const getUpdateMsg = new ArrayBuffer(5); // 4 byte index, 1 byte GetUpdate | ||
| const updateView = new DataView(getUpdateMsg); | ||
| updateView.setInt32(0, 1, /* little */ true); | ||
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| const inputMsg = new ArrayBuffer(20); // idx | x: 4, y: 4, action 4, touch: 1 bytes + padding | ||
| const inputView = new DataView(inputMsg); | ||
| inputView.setInt32(0, 0, true); // set index. | ||
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| function sendInput(type, event) { | ||
| inputView.setInt32(4, event.offsetX * scale, /* little */ true); | ||
| inputView.setInt32(8, event.offsetY * scale, /* little */ true); | ||
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| // 0 = move, 1 = down, 2 = up. | ||
| let action = 0; | ||
| if (type == 'down') { | ||
| action = 1; | ||
| } else if (type == 'up') { | ||
| action = 2; | ||
| } | ||
| inputView.setInt32(12, action, /* little */ true); | ||
| // 0 = pen, 1 = touch. | ||
| inputView.setInt32(16, 0, /* little */ true); | ||
| ws.send(inputMsg); | ||
| console.log("Sent input!"); | ||
| } | ||
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| canvas.addEventListener('mousedown', (event) => { sendInput('down', event); }); | ||
| canvas.addEventListener('mouseup', (event) => { sendInput('up', event); }); | ||
| canvas.addEventListener('mousemove', (event) => { sendInput('move', event); }); | ||
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| // Create a new WebSocket object | ||
| var ws = new WebSocket("ws://localhost:4444"); | ||
| ws.binaryType = "arraybuffer"; | ||
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| // Handle the connection open event | ||
| ws.onopen = function() { | ||
| publicLog("WebSocket connection opened!"); | ||
| // Send get screen packet | ||
| ws.send(getUpdateMsg); | ||
| }; | ||
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| /** | ||
| * @param {DataView} view | ||
| */ | ||
| function showUpdate(view) { | ||
| console.log("Showing update!"); | ||
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| const image = ctx.createImageData(currentUpdate.width, currentUpdate.height); | ||
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| let idx = 0; | ||
| for (let i = 0; i < view.byteLength; i += 2) { | ||
| let rgb = view.getInt16(i, /* little */ true); | ||
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| let b = (rgb & 0x1f) << 3; | ||
| let g = ((rgb >> 5) & 0x3f) << 2; | ||
| let r = ((rgb >> 11) & 0x1f) << 3; | ||
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| image.data[idx++] = r; | ||
| image.data[idx++] = g; | ||
| image.data[idx++] = b; | ||
| image.data[idx++] = 255; | ||
| } | ||
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| const pos = {dx: currentUpdate.x1 / scale, dy: currentUpdate.y1 / scale}; | ||
| window.createImageBitmap( | ||
| image, | ||
| 0, | ||
| 0, | ||
| image.width, | ||
| image.height, | ||
| { resizeWidth: image.width / scale, resizeHeight: image.height / scale } | ||
| ).then((bitmap) => { | ||
| ctx.drawImage(bitmap, pos.dx, pos.dy); | ||
| console.log("Updated image!"); | ||
| }); | ||
| } | ||
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| const msgSize = 6 * 4; | ||
| const maxScreenUpdate = 1872 * 1404 * 2; | ||
| const buffer = new Uint8Array(msgSize + maxScreenUpdate); | ||
| var bufferOffset = 0; | ||
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| var currentUpdate = null; | ||
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| function consumeFront(size) { | ||
| buffer.copyWithin(0, size, bufferOffset); | ||
| bufferOffset -= size; | ||
| } | ||
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| function getNextExpectedSize() { | ||
| if (currentUpdate == null) { | ||
| return msgSize; | ||
| } | ||
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| return currentUpdate.width * currentUpdate.height * 2; | ||
| } | ||
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| function processData() { | ||
| while (bufferOffset >= getNextExpectedSize()) { | ||
| if (currentUpdate == null) { | ||
| const view = new DataView(buffer.buffer, 0, msgSize); | ||
| const msg = { | ||
| // int y1; | ||
| y1: view.getInt32(0, /* little */ true), | ||
| // int x1; | ||
| x1: view.getInt32(4, /* little */ true), | ||
| // int y2; | ||
| y2: view.getInt32(8, /* little */ true), | ||
| // int x2; | ||
| x2: view.getInt32(12, /* little */ true), | ||
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| // int flags; | ||
| flags: view.getInt32(16, /* little */ true), | ||
| // int waveform; | ||
| wave: view.getInt32(20, /* little */ true), | ||
| }; | ||
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| msg.width = msg.x2 - msg.x1 + 1; | ||
| msg.height = msg.y2 - msg.y1 + 1; | ||
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| currentUpdate = msg; | ||
| console.log("Got message:", msg); | ||
| consumeFront(msgSize); | ||
| } else { | ||
| const size = getNextExpectedSize(); | ||
| showUpdate(new DataView(buffer.buffer, 0, size)); | ||
| consumeFront(size); | ||
| currentUpdate = null; | ||
| } | ||
| } | ||
| } | ||
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| // Handle incoming messages | ||
| ws.onmessage = function(event) { | ||
| if (event.data instanceof ArrayBuffer) { | ||
| const data = new Uint8Array(event.data); | ||
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| // Append data to buffer, assert (for now) if not possible. | ||
| console.assert(data.byteLength + bufferOffset <= buffer.byteLength); | ||
| buffer.set(data, bufferOffset); | ||
| bufferOffset += data.byteLength; | ||
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| // Process all available data | ||
| processData(); | ||
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| // if (updateArray != null) { | ||
| // const remainingBytes = updateArray.byteLength - currentOffset; | ||
| // const maxData = Math.min(event.data.byteLength, remainingBytes); | ||
| // const otherDataLen = event.data.byteLength - maxData; | ||
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| // const buf = new Uint8Array(event.data, 0, maxData); | ||
| // updateArray.set(buf, currentOffset); | ||
| // currentOffset += buf.byteLength; | ||
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| // if (currentOffset == updateArray.byteLength) { | ||
| // showUpdate(); | ||
| // updateArray = null; | ||
| // currentOffset = 0; | ||
| // } | ||
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| // const remainingBuf = new Uint8Array(event.data, maxData); | ||
| // updateMsgBuffer.set(remainingBuf); | ||
| // currentUpdateOffset = remainingBuf.byteLength; | ||
| // return; | ||
| // } | ||
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| // const remainingBytes = updateMsgBuffer.byteLength - currentUpdateOffset; | ||
| // const maxData = Math.min(event.data.byteLength, remainingBytes); | ||
| // const buf = new Uint8Array(event.data, 0, maxData); | ||
| // updateMsgBuffer.set(buf, currentUpdateOffset); | ||
| // currentUpdateOffset += buf.byteLength; | ||
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| // if (currentUpdateOffset == msgSize) { | ||
| // const view = new DataView(updateMsgBuffer.buffer); | ||
| // const msg = { | ||
| // // int y1; | ||
| // y1: view.getInt32(0, /* little */ true), | ||
| // // int x1; | ||
| // x1: view.getInt32(4, /* little */ true), | ||
| // // int y2; | ||
| // y2: view.getInt32(8, /* little */ true), | ||
| // // int x2; | ||
| // x2: view.getInt32(12, /* little */ true), | ||
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| // // int flags; | ||
| // flags: view.getInt32(16, /* little */ true), | ||
| // // int waveform; | ||
| // wave: view.getInt32(20, /* little */ true), | ||
| // }; | ||
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| // console.log("Got message:", msg); | ||
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| // msg.width = msg.x2 - msg.x1 + 1; | ||
| // msg.height = msg.y2 - msg.y1 + 1; | ||
| // currentUpdate = msg; | ||
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| // const size = msg.width * msg.height * 2; // uint16 -> 2 bytes per pixel. | ||
| // updateArray = new Uint8Array(size); | ||
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| // const remainingBuf = new Uint8Array(event.data, maxData); | ||
| // updateArray.set(remainingBuf); | ||
| // currentOffset = remainingBuf.byteLength; | ||
| // } | ||
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| } else { | ||
| console.log("Received message:", event.data); | ||
| } | ||
| }; | ||
|
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| // Handle any errors that might occur | ||
| ws.onerror = function(error) { | ||
| console.error("WebSocket error:", error); | ||
| }; | ||
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